Global warming? Scientific American reports: "A recent study suggested that humans may not
be warming the earth. Greenhouse skeptics, pro-industry groups and political conservatives have
seized on the results, proclaiming that the science of climate change is inconclusive and that
agreements such as the Kyoto Protocol, which set limits on the output of industrial heat-trapping
gases, are unnecessary. But mainstream climatologists are perturbed that the report has received
so much attention; they say the study's conclusions are scientifically dubious and colored by
politics."